The 3 columns in color are computed by VizieR, and are not part of the original data.

Note: USNO-A2.0 contains 526,280,881 sources, and is based on a re-reduction of the Precision Measuring Machine (PMM) scans from POSS-I O and E plates (>=-18°) and SRC-J and ESO-R plates (<=-20°). USNO-A2.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory.
The major difference between USNO-A2.0 and its previous version USNO-A1.0 is that A1.0 used the Guide Star Catalog as its reference frame whereas A2.0 uses the ICRF as realized by the USNO ACT catalog (Urban et al. 1997). The VizieR search engine uses an on-line compressed version (3.6Gbytes) which was generated at CDS.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	1.523	00 04 53.26680	+16 24 03.2904	1050-00027179	001.221945	+16.400914			18.3	17.9	1954.674

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	APM-ID	RAJ2000 deg	DEJ2000 deg	rmag mag	l_	rClass	rStel	rDiam arcsec	rEll	bmag mag	l_	bClass	bStel	bDiam arcsec	b-r mag	Mflag
1	1.420	00 04 53.26272	+16 24 03.3912	EO1195-0257621	001.221928	+16.400942	18.36		1	7.71	8.5	0.38	19.31		1	16.91	11.4	0.95
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Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	1.183	00 04 53.25504	+16 24 03.6288	N32023203917	001.221896	+16.401008	1995.585	17.85	0.44	17.79	0.44	3	4.98	0.41

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-B1.0	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 mas	e_DEJ2000 mas	Epoch yr	pmRA mas/yr	pmDE mas/yr	Ndet	B1mag mag	R1mag mag	B2mag mag	R2mag mag	Imag mag
1	0.791	00 04 53.29080	+16 24 04.1616	1064-0000897	001.222045	+16.401156	999	999	1954.6	0	0	2	20.29	19.25
2	1.216	00 04 53.24544	+16 24 03.6108	1064-0000896	001.221856	+16.401003	122	176	1978.6	0	0	5	19.38	18.52	18.03	17.77	17.98
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%201.216&%3cFONT%20COLOR=%27#CD5B45%27>00%2004%2053.24544&%3cFONT%20COLOR=%27#CD5B45%27>%2b16%2024%2003.6108&1064-0000896&001.221856&%2b16.401003&122&176&1978.6&%20%20%20%20%200&%20%20%20%20%200&5&19.38&18.52&18.03&17.77&17.98%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663d06a517a819&-out.add=.&-source=I/284/out&USNO-B1.0===1064-0000898&-out.orig=o' class='full'3 3.20700 04 53.46936+16 24 05.88241064-0000898001.222789+16.4016342732901973.6 0 0220.90  20.26     %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20Naval%20Observatory%20Merged%20Astrometric%20Dataset%20%28NOMAD%29%20contains%0aastrometric%20and%20photometric%20data%20for%20over%201%20billion%20stars%20derived%20from%0athe%20Hipparcos%20%28I/239%29,%20Tycho-2%20%28I/259%29,%20UCAC2%20%28I/289%29,%20and%20USNO-B1.0%0a%28I/284%29%20catalogs%20for%20astrometry%20and%20optical%20photometry,%20supplemented%0aby%202MASS%20%28II/246%29%20near-infrared%20photometry.%3cBR%3e%0a%3cFONT%20SIZE=%27-1%27%3eAn%20efficient%20remote%20query%20program%20%3cB%3efindnomad1%20is%0aavailable%20in%20the%20cdsclient%20%0apackage,%20for%20Unix/Linux%20platforms%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	NOMAD1	YM	RAJ2000 deg	DEJ2000 deg	r	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Bmag mag	r_	Vmag mag	r_	Rmag mag	r_	Jmag mag	Hmag mag	Kmag mag	R
1	0.791	00 04 53.290656	+16 24 04.16016	1064-0000904	..	001.2220444	+16.4011556	B	0.0	0.0	0.0	0.0	20.290	o			19.250	e
2	1.217	00 04 53.245344	+16 24 03.61008	1064-0000903	..	001.2218556	+16.4010028	B	0.0	0.0	0.0	0.0	18.030	B			17.770	B
3	3.206	00 04 53.469336	+16 24 05.87988	1064-0000905	..	001.2227889	+16.4016333	B	0.0	0.0	0.0	0.0	20.260	B

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3 [****ClosingBrace(s)Inserted****]
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GSC2.3

%22>RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 1.18300 04 53.25528+16 24 03.6288NB7C003917001.221897+16.4010081995.58517.8517.7918.6517.863 4.98 0.41 %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	pmRA mas/yr	pmDE mas/yr	Jmag mag	Kmag mag	b1mag mag	b2mag mag	r1mag mag	r2mag mag	imag mag	No	fl
1	1.309	00 04 53.24856	+16 24 03.5100	001.221869	+16.400975	-0.6	-5.3			19.38	18.03	18.52	17.77	17.98	5	0
2	3.342	00 04 53.48688	+16 24 05.4792	001.222862	+16.401522	9.1	-18.6			20.90	20.26				2	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 (...)	e_DEJ2000 arcsec	magBJ mag	e_ mag	magRF mag	e_ mag	magG mag	[****ClosingBrace(s)Inserted****]
">

mag&%">\BegDIVclass='sort-down ' </A>dece_
magmagGrvs
mage_
magalphaEpoch
yrdeltaEpoch
yrpmRA
mas/yre_
(...)pmDE
mas/yre_
(...) 1 1.64300 04 53.21251+16 24 03.3108001.221719+16.400920 0.041 0.04517.788 0.30017.854 0.30018.497 0.08517.583 0.1142009.04002009.0400 -0.6 5.2 -5.3 5.2 %0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA mas/yr	e_ (...)	pmxRA mas/yr	e_ (...)	Chi2RA	pmGRA mas/yr	pmDE mas/yr	e_ (...)	pmxDE mas/yr	e_ (...)	Chi2DE	pmGDE mas/yr	Nobs	Flag	PS1	Gaia	DR9+DR12	Sloan	2M
1	1.438	00 04 53.2060310854	+16 24 03.220005894	001.22174047593	+16.40097276166	20.266052	16.812	21.023	16.551	21.034	2.70715e-02		28.194	18.364	27.790	18.382	6.15124e-02		5	0	PS1	Gaia	DR9+DR12	Sloan	2M

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